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Question 1993

Which of the following pair is incorrect ?

ARoentgen : X-ray

BNewton : Law of Gravitation

CFaraday : Diffusion of gases

DPasteur : Bacteriology

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C. Faraday : Diffusion of gasesExplanation: The pair Faraday : Diffusion of gases is incorrect. The law of diffusion of gases was given by Thomas Graham, not Michael Faraday. Faraday is known for his work on electromagnetism and electrolysis. The other pairs are correctly matched.

Question 1992

What is Bryolory?

AStudy of food

BStudy of fruit

CStudy of mosses and liverworts

DStudy of rings

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C. Study of mosses and liverwortsExplanation: Bryology is the branch of botany that deals with the study of bryophytes, which include mosses and liverworts. These are small, non-vascular plants that typically grow in moist and shady environments.

Question 1991

Which of the following is a large blood vessel that carries blood away from the heart ?

AVein

BArtery

CCapillary

DNerve

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B. ArteryExplanation: An artery is a large blood vessel that carries blood away from the heart to various parts of the body. Arteries have thick, elastic walls to withstand high pressure. In contrast, veins carry blood toward the heart, and capillaries are tiny vessels that connect arteries and veins.

Question 1990

Which of the following is not a member of vitamin B Complex ?

AThiamine

BRiboflavin

CFolic acid

DAscorbic acid

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D. Ascorbic acidExplanation: Ascorbic acid is not a member of the vitamin B complex; it is actually vitamin C. The vitamin B complex includes vitamins like thiamine (B₁), riboflavin (B₂), niacin (B₃), folic acid (B₉), and others that play important roles in metabolism and energy production.

Question 1989

The HIV virus affects the:

ALeucocytes

BLymphocytes

CErythrocytes

DNone of these

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B. LymphocytesExplanation: The HIV (Human Immunodeficiency Virus) primarily attacks the lymphocytes, especially the CD4⁺ T-helper cells of the immune system. This weakens the body’s defense mechanism, making it vulnerable to various infections and diseases, eventually leading to AIDS (Acquired Immunodeficiency Syndrome).

Question 1988

Liquid natural gas (LNG) predominantly contains _______ in liquid form.

AEthane

BEthylene

CMethane

DMethylene

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C. MethaneExplanation: Liquid Natural Gas (LNG) predominantly contains methane (CH₄) in liquid form. It is produced by cooling natural gas to about −162°C, which reduces its volume for easier storage and transportation. LNG is a clean fuel with high energy efficiency and low emissions.

Question 1987

What is reason for using red light as a stop signal ?

ALong wavelength

BShort wavelength

CChromogenic effect

DInfra Red

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A. Long wavelengthExplanation: Red light is used as a stop signal because it has the longest wavelength among visible colors, allowing it to scatter the least and remain visible from a greater distance, even in fog, rain, or dust. This ensures better visibility and safety on roads.

Question 1986

Which of the following is not correctly matched ?

ABecquerel : Radioactivity

BAlexander Flaming : Penicillin

CLouis Pasteur : Blood groups

DWilliam Harvey : Blood circulation

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C. Louis Pasteur : Blood groupsExplanation: The pairing Louis Pasteur : Blood groups is not correctly matched. Louis Pasteur is known for his work on pasteurization and germ theory of disease, not for discovering blood groups. The discovery of blood groups was made by Karl Landsteiner in 1900. Other matches are correct.

Question 1985

All ships have sonar system. It is used to detect /measure :

ADistance of the shore

BSound on the surface

CSound of animals in Sea

DDepth of ocean

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D. Depth of oceanExplanation: SONAR (Sound Navigation and Ranging) is a system used in ships and submarines to determine the depth of the ocean or to locate underwater objects. It works by sending sound waves into the water and measuring the time taken for the echo to return after reflecting from the seabed or any object.

Question 1984

Which of the following is not correct ? (a) Exercise does not help in managing psychological discomfort. (b) Exercise increases cardio-respiratory fitness. (c) Exercise reduces risk of diabetes. (d) Exercise helps in managing bone health.

AExercise does not help in managingpsychological discomfort.

BExercise increases cardio-respiratory fitness.

CExercise reduces risk of diabetes.

DExercise helps in managing bone health.

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A. Exercise does not help in managingpsychological discomfort.Explanation: The statement “Exercise does not help in managing psychological discomfort” is incorrect. Regular physical exercise helps reduce stress, anxiety, and depression by releasing endorphins — the body’s natural mood enhancers. It also improves overall mental health, cardio-respiratory fitness, reduces the risk of diabetes, and strengthens bones.

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Which of the following pair is incorrect ?

What is Bryolory?

Which of the following is a large blood vessel that carries blood away from the heart ?

Which of the following is not a member of vitamin B Complex ?

The HIV virus affects the:

Liquid natural gas (LNG) predominantly contains _______ in liquid form.

What is reason for using red light as a stop signal ?

Which of the following is not correctly matched ?

All ships have sonar system. It is used to detect /measure :

Which of the following is not correct ? (a) Exercise does not help in managing psychological discomfort. (b) Exercise increases cardio-respiratory fitness. (c) Exercise reduces risk of diabetes. (d) Exercise helps in managing bone health.

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